10.2.2   Hygroscopicity
Hygroscopic goods place particularly severe demands upon container transport. Hygroscopicity is the term used to describe the capability of goods to respond to the moisture content of air by absorbing water vapor from the air or releasing water vapor back into the air. Of decisive significance for the absorption or release of water vapor are: Many hygroscopic goods are of organic origin. However, many chemical products, even those of inorganic origin, are hygroscopic and require that appropriate attention be paid to this property during container transport.
 
These goods are often also the root cause of damage to hygroscopically neutral goods, such as metals and metal products, by providing a source of elevated relative humidity in the container or of sweat and so causing corrosion.
 

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